Attached are some pics of new wood companionway slides I installed yesterday. The original ones were plastic and had cracked in a number of places. They are made out of Sipo and lucky enough for me....cost nothing! My sister owns a wood shop and had some scrapes laying around. They were simple to mill up with all of her equipment.
Total price to me was 45 minutes of time, 5 dollars in stainless hardware and a tiny bit of butyl tape. Works much better than the old ones and they have made the sliding action quite a bit quieter.